Polyazo dyes with diazo components of the aminophenol and the amino diphenyl-sulfide, -sulfoxide or -sulfone series

US5104979A · kind A · utility

Assignee

• BASF SE

Inventors

• Guenter Hansen · Ludwigshafen, DE
• Georg Zeidler · Schifferstadt, DE
• Ortwin Schaffer · Ludwigshafen, DE

Key dates

• Filing date: Jul 31, 1990
• Grant date: Apr 14, 1992
• Expiry date: Jul 31, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B35/50
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polyazo dyes useful for dyeing leather in the free form or as copper, chromium, iron, cobalt or nickel complexes have the formula ##STR1## where m is 0, 1 or 2, n is 0 or 1, p is from 1 to 2, q is from 0 to 1, and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y and the ring A are each as defined, and may be prepared from aniline derivatives of the formula ##STR2## where m is 0, 1, or 2, n is 0 or 1, and X, R.sup.1, R.sub.2 and R.sup.3 are each as defined.